<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>400 Bad Request</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }

        body {
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background-color: #f8f9fa;
            color: #333;
        }

        .error-container {
            text-align: center;
            max-width: 600px;
            padding: 2rem;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .error-code {
            font-size: 6rem;
            font-weight: bold;
            color: #dc3545;
            margin-bottom: 1rem;
        }

        .error-message {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: #666;
        }

        .error-description {
            font-size: 1rem;
            line-height: 1.6;
            color: #6c757d;
            margin-bottom: 2rem;
        }

        .back-link {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            background-color: #0d6efd;
            color: white;
            text-decoration: none;
            border-radius: 4px;
            transition: background-color 0.3s;
        }

        .back-link:hover {
            background-color: #0a58ca;
        }
    </style>
</head>

<body>
    <div class="error-container">
        <div class="error-code">400</div>
        <div class="error-message">Bad Request</div>
        <div class="error-description">
            服务器无法理解您的请求。可能是请求格式错误或参数无效，请检查后重试。
        </div>
        <a href="/" class="back-link">返回首页</a>
    </div>
</body>

</html>